<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			body{
				margin: 0;
			}
			.root-div{
				font-size: 0;
			}
			.root-div>div{
				display: inline-block;
				width: 25vw;
				height: 25vw;
			}
			.root-div>div:nth-child(1){
				background: #555;
			}
			.root-div>div:nth-child(2){
				background: #888;
			}
			.root-div>div:nth-child(3){
				background: #AAA;
			}
			.root-div>div:nth-child(4){
				background: #eee;
			}
			
		</style>
	</head>
	<body>
		<div class="root-div">
			<div>12345dsdasd</div>
			<div>fsfsfsf</div>
			<div></div>
			<div></div>
		</div>
		
		
	</body>
</html>
